TY - GEN
T1 - Optically induced sub-wavelength transient apertures in Sb-Te based films
AU - Simpson, Robert E.
AU - Fons, Paul J.
AU - Kolobov, Alexander V.
AU - Wang, Xiomin
AU - Tominaga, Junji
PY - 2011
Y1 - 2011
N2 - The origin of sub-diffraction-limit apertures in Sb-based thin films is discussed. Electromagnetic energy can be channeled by these apertures thus allowing near-field focussing- the Super-RENS effect. The aperture formation within Sb, Sb 2Te 3 , Sb 2Te, SbTe and Ge 2Sb 2Te 5 is investigated by time resolved optical pump-probe techniques and found to occur without melting. Density functional calculations have shown that these materials exhibit a threshold-like change in their optical properties below their melting temperatures. The threshold is shown to be a consequence of thermally induced misalignment of p-orbital bonds. It is the non-linearity of this process that leads to the formation of the sub-diffraction-limit apertures.
AB - The origin of sub-diffraction-limit apertures in Sb-based thin films is discussed. Electromagnetic energy can be channeled by these apertures thus allowing near-field focussing- the Super-RENS effect. The aperture formation within Sb, Sb 2Te 3 , Sb 2Te, SbTe and Ge 2Sb 2Te 5 is investigated by time resolved optical pump-probe techniques and found to occur without melting. Density functional calculations have shown that these materials exhibit a threshold-like change in their optical properties below their melting temperatures. The threshold is shown to be a consequence of thermally induced misalignment of p-orbital bonds. It is the non-linearity of this process that leads to the formation of the sub-diffraction-limit apertures.
UR - https://www.scopus.com/pages/publications/84860143234
U2 - 10.1557/opl.2011.988
DO - 10.1557/opl.2011.988
M3 - Conference contribution
AN - SCOPUS:84860143234
SN - 9781618395337
T3 - Materials Research Society Symposium Proceedings
SP - 9
EP - 14
BT - Phase-Change Materials for Memory and Reconfigurable Electronics Applications
T2 - 2011 MRS Spring Meeting
Y2 - 25 April 2011 through 29 April 2011
ER -